physiology MCQs – Page 25

Practise focused physiology questions with marked answers for exam preparation and subject revision.

physiology Mcqs
482. Cardiac output is not affected by __________________?
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A. Peripheral resistance

B. Heart rate

C. Systolic blood pressure

D. Venous return

485. Stimulation of baroreceptors results in_______________?
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A. Decrease in blood pressure

B. Increase in heart rate

C. Increased sympathetic discharge

D. Decreased vagal discharge

486. The function of Carotid body is_______________?
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A. Measures the change in Po2 in arterial blood

B. Measures the change in CO2 in venous blood

C. Measures Po2 in venous blood

D. Measures the changed in CO2 in arterial blood

487. Increase in carotid sinus pressure produces__________________?
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A. Reflex tachycardia

B. Reflex Hypercapnia

C. Reflex hyperpnea

D. Reflex Hypercapnia
488. The term myopia refers to ______________?
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A. Constriction of the pupil

B. Far sightedness

C. Near sightedness

D. Dilation of the pupil

489. Conduction velocity is least in_______________?
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A. SA node

B. Purkinje fibers

C. AV node

D. SA node

490. What is common between systemic and pulmonary circulation is_____________?
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A. Volume of the circulation per minute

B. Total Capacity

C. Peripheral vascular resistance

D. Pulse Pressure

491. Fastest conducting tissue in human heart _________________?
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A. Purkinje fibers

B. AV node

C. Bundle of His

D. SA node

492. Cardiac output is a measure of______________?
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A. Blood pressure X cardiac rate

B. Peripheral resistance X tissue fluid

C. Peripheral resistance X cardiac rate

D. Heart rate X blood volume
493. Abdominal visceral pain is transmitted by ________________?
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A. fibers

B. Sympathetic fibers

C. fibers

D. Parasympathetic fibers

494. Respiratory center is situated in_______________?
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A. Hypothalamus

B. Medulla oblongata

C. Midbrain

D. Spinal cord

495. In determining blood pressure by auscultatory method_____________?
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A. Systolic pressure estimation tends to be lower than those make by palpatory method

B. The first sound heard is the systolic pressure

C. The sounds that are heard are generated in heart

D. The loudest sound is the diastolic pressure

496. Satiety center in hypothalamus is regulated by ________________?
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A. Blood insulin levels

B. Blood glucose levels

C. Gastric dilatation

D. All of the above

497. Isovolumetric relaxation ends immediately after________________?
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A. When ventricular pressure falls below aortic pressure

B. When ventricular pressure falls below atrial pressure

C. None of the above

D. AV Valve closes

498. 2nd heart sound is characterized by all except______________?
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A. Marks the onset of diastole

B. Has longer duration than 1st heart sound

C. Is occasionally split

D. Due to closure of semilunar valves

500. Intensity of sound is measured in________________?
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A. Diopters

B. Daltons

C. Decibels

D. Pounds